Build with ESM

[nfroidure]

Node14 now supports ESM, when AWSLambda and GCP will upgrade to it, we will be able to build ESM modules. Here is a to do list to achieve this:

• ensure dependencies are doing ESM well (type: 'module' in package.json https://nodejs.org/api/packages.html#packages_type and .js files are ESM , ensure imports have file extension Webpack 5 support. ESM strict mode JedWatson/react-select#4253 )
• tweak the compiler configuration: https://github.com/nfroidure/whook/blob/master/packages/whook-aws-lambda/src/services/compiler.ts#L141-L145
• consider to use TypeScript transpiler only since babel were used for supporting modules only ( TS4.7 seems to be on its way to full ESM support https://devblogs.microsoft.com/typescript/announcing-typescript-4-7-beta/ )
• consider AWS Lambda (https://aws.amazon.com/fr/blogs/compute/using-node-js-es-modules-and-top-level-await-in-aws-lambda/)
• consider GCP integrations https://cloud.google.com/functions/docs/concepts/nodejs-runtime#using_es_modules : reported to Improve the GCP integration #178
• fix common-services to resolve modules with import.meta Make the resolve service use import.meta.resolve common-services#20
• fix the problem with ts-node: (maybe use tsx

[nfroidure]

Use esbuild instead since it supports ts natively and is made for bundling : #105

[nfroidure]

Sadly AWS lambda support is fake since the layers doesn't support ESM... see https://github.com/vibe/aws-esm-modules-layer-support

[nfroidure]

Jest is not supporting ESM fully, will lurk its progress: jestjs/jest#14923